When is the EcoTrail Paris 2027?

The spring edition takes place on Saturday 20 and Sunday 21 March 2027. The 80 km starts on Saturday 20 March between 10:30 and 10:55 am from the Colline d’Élancourt. The new autumn edition took place on 17 October 2026.

Can you still enter the 80 km of the EcoTrail Paris 2027?

The 80 km is full. What remains is the waiting list, and the official bib resale, open to entrants until 7 March 2027; buying a bib outside this system is forbidden.

How do you get to the 80 km start?

Take the RER C to Saint-Quentin-en-Yvelines station, then the free shuttle to the start area on the Colline d’Élancourt. Bibs are collected beforehand, on Thursday 18 or Friday 19 March, from 11 am to 8:30 pm, at the Émile-Anthoine sports centre in Paris.

What is the 80 km time limit?

13h15 from the start. The intermediate limits are in the roadbook; in 2026 they were 3h30 at Buc (km 25), 5h35 at Chaville (km 37.7), 8h30 at Meudon Marcel-Bec (km 53.6) and 11h45 at Saint-Cloud (km 72.4).

No. The rules ban poles on every race, and using them means disqualification.

EcoTrail de Paris: how many weeks of preparation?

For an athlete at intermediate level, Endu builds a 21-week preparation. If your race is closer, the plan compresses phases while keeping the taper; if it's further away, it lengthens the preparation, and when the gap is large the preparation starts right away, gently and at your current volume, before building up.

How many sessions per week?

This example has 4 sessions per week. You choose 4 to 7 training days and the exact days (e.g. Tue, Thu, Sat, Sun): the plan sticks to them.

I'm a beginner, is this plan for me?

The plan adapts to your declared level (beginner to semi-pro): starting volume, progression and intensity change. Endu also offers a "Discovery" mode without a race to build a base first.

Can I follow sessions on my watch?

Yes, on Garmin and COROS. On Garmin, the Endu app (Connect IQ Store) shows today’s session and starts it as a guided workout. On COROS, link your account from your profile: your running, trail and cycling sessions land in the watch calendar. Other brands are not supported yet.

How much does it cost?

14-day free trial, then €7.99/month with no commitment or €59.88/year (€4.99/month). Unlimited objectives and sports.

EcoTrail de Paris 2027: date, course and training plan

81.8 km · 1,200 m D+Paris2027 edition: 20 March 2027

The Salomon EcoTrail Paris is the big trail race of the western Paris region. Its 80 km, the historic distance since 2008, starts from the Colline d’Élancourt and finishes on the first floor of the Eiffel Tower, after 81.8 km, 92% of it off-road. The 2027 spring edition takes place on 20 and 21 March, with the 80 km on Saturday 20 March; an autumn edition has been added since 17 October 2026.

Your plan for EcoTrail de Paris

19 weeks to go: your plan starts this week, set to your level and free days, then adapts to your feedback after each session.

Your level?

14-day trial, cancel anytime.

EcoTrail de Paris at a glance

Date: 2027 edition: 20 March 2027
Formats: Trail 80 kmPlan below — 81.8 km and 1,200 m of climbing according to the race page (1,300 m in the rules), 92% off-road. Start from the Colline d’Élancourt on Saturday 20 March 2027, in waves between 10:30 and 10:55 am; finish on the first floor of the Eiffel Tower. Time limit: 13h15. Up to 3,000 starters. FFA Silver label. €115, €125 then €145 depending on the price tier, €8 less for FFA licence holders. Full.
Trail 120 km — Start at the Château de Rambouillet on Saturday 20 March 2027 between 9 and 9:20 am, 1,850 m of climbing, finish at the Pont d’Iéna. Time limit: 21h15. From €170 to €205.
Trail 45 km et Trail 30 km — On Saturday 20 March: 45 km from the Château de Versailles estate (800 m of climbing) and 30 km (400 m). Full.
Trail 35 km, 20 km et 10 km — On Sunday 21 March, starting from the Domaine National de Saint-Cloud: 850 m, 550 m and 170 m of climbing.
Édition d'automne — New in 2026: an 80 km (1,000 m of climbing, from Saint-Germain-en-Laye to the Domaine National de Saint-Cloud), a 50 km and a 20 km, run on 17 October 2026.
Registration: Registration for spring 2027 is online only, through the ticketing link on the official site. The Trail 80 km is full: a waiting list is open, and an official resale will let entrants give up their bib until 7 March 2027, with a 75% refund. No person-to-person transfers are allowed. 80 km prices: €115 in tier 1, €125 in tier 2, then €145, with €8 off for FFA licence holders, plus platform fees; optional cancellation cover (€25). You must be born before 31 December 2007 and enter your 2026-2027 FFA licence or a PPS before 15 March 2027. No points are required, but the organisers advise having already finished a 45 km trail.
Official website: ecotrailparis.com/course/trail-80-km

The 2026 course

Course of the 2026 edition, run on Saturday 21 March. Start from the Colline d’Élancourt from 10:30 am, in waves of 250 runners every 2 minutes 30. The route, 92% off-road, crosses the western Paris region and passes the aid stations at Buc (km 25), Chaville Jean-Jaurès (km 37.7), Meudon Saint-Philippe (km 47.7), Meudon Marcel-Bec (km 53.6) and Saint-Cloud (km 72.4), before reaching Paris and the finish on the first floor of the Eiffel Tower, after 81.8 km and 1,200 m of climbing. Time limits from the start: 3h30 at Buc, 5h35 at Chaville, 7h20 at Meudon Saint-Philippe, 8h30 at Meudon Marcel-Bec, 11h45 at Saint-Cloud and 13h15 at the finish. The 2027 course has not been detailed yet.

What the race asks of your training

A runnable ultra

About 1,200 m of climbing over 82 km is not much: almost everything is runnable, on forest tracks and through parks. The race is decided by endurance and an even pace rather than by climbing. Long easy runs, with blocks at race pace, and a few threshold sessions are the core of the build-up.

A build-up in midwinter

For a race on 20 March, a 14- to 16-week build-up starts in late November or early December: it is cold, dark early, and the trails are often muddy. Plan headtorch runs during the week and keep the long run for the weekend, in daylight.

Hills late in the race

After Buc, the course strings together Chaville, Meudon and Saint-Cloud, on the wooded heights west of Paris, before reaching the Seine and the city. The short climbs therefore come on tired legs: short hills at the end of long runs and leg strength work prepare you for these changes of pace.

A night finish and mandatory kit

Starting around 10:30 am, many runners finish after dark: a headtorch and a reflective armband are mandatory, along with a 1.5-litre water reserve, food, a cup, a survival blanket and a phone. Poles are banned, on pain of disqualification. Do your last long runs with a loaded pack.

The plan below prepares the Trail 80 km format, for an athlete at intermediate level with 4 days available per week, with race day on 20 March 2027. Aiming for another format? Enter its distance when you create your plan, which will be calibrated on your level, your available days and your feedback after every session.

weeks: 21
sessions: 84
sessions / week: 4
peak week: 10.9 h

Plan structure

Periodised in phases: build the base, move to race-specific work, then taper before the race.

General preparation
Weeks 1–2 · 2 wk
Base
Weeks 3–8 · 6 wk
Build
Weeks 9–13 · 5 wk
Specific
Weeks 14–18 · 5 wk
Taper
Weeks 19–20 · 2 wk
Race week
Weeks 21–21 · 1 wk

Volume progression

Week by week: lighter recovery weeks are built in to absorb the load.

Wk	Phase	Hours	km	Elev.
1	General preparation	6.4 h	45	379 m
2	General preparation	6.6 h	48	485 m
3	Baserecovery	5.2 h	38	267 m
4	Base	6.6 h	47	484 m
5	Base	7.2 h	50	497 m
6	Base	7.5 h	54	564 m
7	Baserecovery	5.9 h	42	361 m
8	Base	7.5 h	51	643 m
9	Build	8.1 h	54	677 m
10	Build	8.6 h	59	631 m
11	Buildrecovery	6.6 h	48	425 m
12	Build	8.6 h	57	832 m
13	Build	9.3 h	63	765 m
14	Specific	9.8 h	66	767 m
15	Specificrecovery	7.5 h	54	470 m
16	Specific	9.6 h	65	932 m
17	Specific	10.5 h	72	867 m
18	Specific	10.9 h	74	1,017 m
19	Taper	6.9 h	49	459 m
20	Taper	5.4 h	39	153 m
21	Race week	3.6 h	30	26 m

Sample week — week 12 (Build)

Real sessions from the plan with their targets. Each session is detailed step by step, and can be sent to a Garmin or COROS watch.

TuesdayModerate
2 × (11 min climb + 6 min descent)
49 min · 5.7 km
FridayEasy
40 min easy
40 min · 5.3 km
SaturdayEasy
Back-to-back long run
2 h 03 · 13 km
SundayEasy
Long run 5 h 02
5 h 02 · 33 km

Example generated for a intermediate-level profile (MAS 15 km/h, 4 days available per week). Your plan will depend on your level, availability and feedback.

This plan’s check-up

Pass

A 21-week build (recommended minimum: 20); a longest run never more than 10% above the previous month’s; volume rising at most 9% from one week to the next; 97% of the time at easy effort; the longest session 3 weeks before the race; a taper cutting volume by 67% in race week.

2 worth knowing · 16 checks passed

Remarks

Strength training — No strength session.
Fueling — Long sessions (up to 360 min in this plan) are where race fueling is rehearsed.

The 16 checks passed, in detail

Length of the build — 21 weeks: enough for this race (recommended minimum: 20).
Sessions per week — 4 sessions a week: the minimum for this race is met.
Volume progression — Running volume rises at most 9% from one week to the next (a signal appears beyond 20%).
Long run increase — Each week, the longest run is at most 10% longer than the longest of the previous month (benchmark: 10%).
Lighter weeks — A lighter week comes back regularly (weeks 3, 7, 11, 15, 19).
Intensity distribution — About 97% of the time at easy effort: the most common distribution among trained endurance athletes.
Demanding sessions — No more than 2 demanding session(s) a week: suited to the level.
Hard days back to back — Demanding sessions are separated by easy days.
Rest days — At least one rest day a week.
Climbing in training — The plan prepares the climbs and descents (32 sessions with elevation).
Timing of the longest session — The longest session falls 3 weeks before the race: the right time.
Taper — Volume drops 67% in race week.
Intensity during the taper — Short race-pace efforts remain in the last two weeks.
Frequency during the taper — The number of sessions stays close to usual (100%).
Climbing in the busiest week — The busiest week climbs 1017 m, for 1200 m on race day.
Back-to-back long runs — The plan has back-to-back long runs (8 weekends).

Endu runs its own plans through the plan check open to everyone: same public rules, same thresholds, same sources. The rules and their sources, and a check of your own plan.

Why this plan works

Science-based periodisation

Base → build → specific → taper, with a recovery week every 3 to 4 weeks. Load goes up, but never two hard weeks in a row without a breather.

Paces, not vague feelings

Every session has target zones (pace, HR) computed from your MAS or a reference performance. A MAS test is built into the plan if you don't know yours.

Elevation as the central variable

Weekly climbing volume, long hilly runs, downhill technique and power-hiking for ultras: a trail plan is not a road plan with bumps.

A plan that listens

After each session you rate how it felt (RPE). Too hard? The plan eases what follows. Skipped a session? It reschedules or absorbs it.

On your watch

On Garmin with the Endu app, on COROS by direct sync: the guided workout shows up on your wrist, step by step.

Reviews

What our users say.

4.8/5

“I took Endu to prepare a trail race with friends. I really like having my week already organised: it motivates me and I enjoy my runs more.”
Émilie · Trail
“What I like is no longer asking myself a thousand questions before going for a run. I follow the plan and I enjoy training.”
Nicolas · Trail
“With work and the kids, I thought I’d struggle to follow a plan. In the end, having a structure helps me a lot. Running has found a real place in my week again, and it feels good!”
Julie · Trail
“I used to spend more time looking for a plan than following one. Now I have my sessions, I know what to do and I stick to it. Really glad I tried it.”
Thomas · Running
“Training for my first half marathon and honestly, I’m getting into it! I even look at my next sessions ahead of time, when before I was mostly looking for an excuse not to go out 😂”
Camille · Running
“Simple to follow and really handy with the watch. I start my session and off I go.”
Julien · Running
“A good find to prepare my swimrun! It’s nice to find a plan for this sport. I’ve recommended it to my teammate.”
Antoine · Swimrun
“I run more regularly and, above all, with more desire. For that alone, I’m delighted.”
Laura · Swimrun
“For triathlon, having all three sports in the same schedule really makes my life easier. I spend less time organising my training and I still enjoy following it just as much.”
Maxime · Triathlon
“At first I just wanted to try it. Now checking the next day’s session has become my little evening ritual 😊”
Sarah · Triathlon

Your plan, not a template athlete's

This plan is generated for an athlete at intermediate level with 4 days available per week. Yours will be calibrated on your MAS, your available days and your feedback after every session. 3 minutes. 14-day trial, cancel anytime.

Create my plan for EcoTrail de Paris